What are Causes/ Factors for gall bladder problems?

I had my gall bladder taken out a year or two ago. I felt as though I had indigestion very, very frequently. I had to stick my finger down my throat, but I vomited some phlegm a couple times. The indigestion like feeling occurred just below where my bottom ribs meet. This was my ailment when saw my doctor, and gall bladder trouble was the diagnosis.